2200 - 2299
Solutions categorised by Problem IDs
2208 - Minimum Operations to Halve Array SumMinimize operations to halve the array sum by repeatedly taking the largest current value from a heap and halving it.2209 - Minimum White Tiles After Covering With CarpetsMinimize uncovered white tiles by choosing where to place fixed-length carpets with dynamic programming.2214 - Minimum Health to Beat GameFind the least starting health needed by using armor on the hit that gives the greatest damage reduction.2218 - Maximum Value of K Coins From PilesMaximize the value of exactly k coins by comparing how many top coins to take from each pile with dynamic programming.2223 - Sum of Scores of Built StringsCompute the sum of prefix-match scores for all suffixes using the Z algorithm.2224 - Minimum Number of Operations to Convert TimeConvert one time to another in the fewest operations by greedily taking the largest allowed minute increments.2225 - Find Players With Zero or One LossesIdentify players with zero or one loss by counting match outcomes and returning each group in sorted order.2226 - Maximum Candies Allocated to K ChildrenMaximize equal candy portions for k children by binary searching a portion size and counting how many portions it yields.2227 - Encrypt and Decrypt StringsImplement dictionary-based encryption and count the words that could produce a given ciphertext using hash maps.2229 - Check if an Array is ConsecutiveDetermine whether the array forms a consecutive sequence by sorting it and comparing neighboring values.2231 - Largest Number After Digit Swaps by ParityMaximize a number with parity-preserving swaps by placing the largest available same-parity digit at each position.2232 - Minimize Result by Adding Parentheses to ExpressionMinimize an addition expression's value by trying every valid placement of a pair of parentheses around the plus sign.2233 - Maximum Product After K IncrementsMaximize the product after k increments by using a priority queue to repeatedly increase a smallest value.2235 - Add Two IntegersSolve LeetCode 2235 with direct addition, or use XOR and carry bits to add two integers without the plus operator.2237 - Count Positions on Street With Required BrightnessCount street positions meeting their brightness requirement by sweeping the start and end of each light's coverage.2239 - Find Closest Number to ZeroFind the integer closest to zero in one pass, choosing the larger value when two candidates are equally close.2240 - Number of Ways to Buy Pens and PencilsCount affordable combinations of pens and pencils by fixing the quantity of one item and counting choices for the other.2241 - Design an ATM MachineSimulate deposits and withdrawals in an ATM that dispenses larger denominations first and tracks available banknotes.2242 - Maximum Score of a Node SequenceMaximize a four-node path's score by examining its middle edge and high-scoring neighbors at each end.2243 - Calculate Digit Sum of a StringReduce a digit string by splitting it into groups and replacing each group with its digit sum until it is short enough.2244 - Minimum Rounds to Complete All TasksMinimize task rounds by grouping equal difficulties in twos and threes and detecting impossible singletons.2246 - Longest Path With Different Adjacent CharactersFind the longest tree path whose adjacent characters differ by combining compatible child branches during depth-first traversal.2248 - Intersection of Multiple ArraysFind the sorted intersection of multiple arrays by keeping only values that appear in every array.2249 - Count Lattice Points Inside a CircleCount distinct lattice points covered by one or more circles by testing integer coordinates against squared radii.2250 - Count Number of Rectangles Containing Each PointCount rectangles containing each query point by grouping rectangles by height and searching their widths.2251 - Number of Flowers in Full BloomCount flowers blooming at each arrival time by sweeping bloom starts, ends, and queries in time order.2255 - Count Prefixes of a Given StringCount how many words in an array match the beginning of a given string.2256 - Minimum Average DifferenceFind the split with the minimum difference between truncated averages by computing prefix and suffix sums.2259 - Remove Digit From Number to Maximize ResultMaximize a decimal number after removing one occurrence of a specified digit by comparing candidate results.2260 - Minimum Consecutive Cards to Pick UpFind the shortest consecutive block of cards containing a duplicate by tracking the last position of each value.2261 - K Divisible Elements SubarraysCount distinct subarrays with at most k elements divisible by p by extending candidate ranges and recording their contents.2262 - Total Appeal of A StringSum the number of distinct characters over all substrings by tracking each character's contribution from its occurrence positions.2264 - Largest 3-Same-Digit Number in StringFind the largest three-digit substring consisting of a single repeated digit by checking runs in the input.2265 - Count Nodes Equal to Average of SubtreeCount nodes equal to their subtree's integer average by returning subtree sums and sizes in postorder.2266 - Count Number of TextsCount possible text messages for a sequence of phone keypad presses by grouping compatible presses with dynamic programming.2267 - Check if There Is a Valid Parentheses String PathSearch for a valid parentheses path in a grid by tracking position and unmatched opening brackets with memoization.2273 - Find Resultant Array After Removing AnagramsRemove adjacent anagrams by comparing sorted letter signatures and keeping the first word in each consecutive group.2274 - Maximum Consecutive Floors Without Special FloorsFind the longest stretch without a special floor by sorting the special floors and measuring the gaps between boundaries.2275 - Largest Combination With Bitwise AND Greater Than ZeroFind the largest subset with positive bitwise AND by counting how many candidates share each set bit.2276 - Count Integers in IntervalsMaintain the count of covered integers as intervals arrive by merging overlaps and updating their combined length.2278 - Percentage of Letter in StringCompute a letter's percentage in a string by counting occurrences and rounding the result down.2279 - Maximum Bags With Full Capacity of RocksMaximize the number of full bags by filling the smallest remaining capacity gaps first.2280 - Minimum Lines to Represent a Line ChartFind how many line segments represent a stock chart by sorting the points and detecting changes in slope.
